Answer:
i) Use of wrong Indicator in acid base titration.
ii) Addition of chemicals with improper sequence.
iii) Wrong technique used during chemical reaction.
Answer:
Well, to separate salt from water, you would stir the two together to create a homogenous mixture. Then you would boil the mixture; all the water would evaporate, leaving behind the salt
Explanation:
Answer: Option (d) is the correct answer.
Explanation:
It is given that boiling point of chlorine is 239 K. To convert temperature in degree Celsius, use the formula as follows.
Temperature in Kelvin = Temperature in degree Celsius + 273
or, Temperature in degree Celsius = Temperature in Kelvin - 273
= 239 - 273
= 
Thus, we can conclude that when chlorine boils at 239 K then boiling point of chlorine expressed in degrees Celsius is .
Answer:
18.01528 g/mol
Explanation:
The molar mass is the total of all atomic weights of atoms in a molecule, expressed as grams. Hence water has 2 hydrogen atoms and one oxygen atom.
Answer:
a. 211.7
Explanation:
Iron Pyrite reacts with Oxygen to produce Iron (II) Oxide and Sulphur (IV) Oxide.
The equation is as follows:
4FeS₂₍s₎ + 11O₂₍g₎ → 2Fe₂O₃₍s₎ + 8SO₂₍g₎
From the equation, 4 moles of FeS₂ produce 8 moles of SO₂.
Therefore the reaction ratio is 4:8 or 1:2
198.20 grams of FeS₂ into moles is calculated as follows:
Moles= Mass/RMM
RMM of FeS₂ is 119.9750g/mol.
Number of moles = 198.20/119.9750g/mol
=1.652 moles of FeS₂
The reaction ratio of FeS₂ to SO₂ produced is 1:2
Thus SO₂ produced = 1.652 moles×2/1=3.304 moles
The mass of SO₂ produced =Moles ×RMM
=3.304 moles ×64.0638 g/mol
=211.667 grams
=211.7g
